#include "shader_CFluidPlaneShader.hpp"

static const char* VS =
"struct VertData\n"
"{\n"
"    float4 posIn : POSITION;\n"
"    float4 normalIn : NORMAL0;\n"
"    float4 binormalIn : NORMAL1;\n"
"    float4 tangentIn : NORMAL2;\n"
"    float4 colorIn : COLOR;\n"
"};\n"
"\n"
"cbuffer FluidPlaneUniform : register(b0)\n"
"{\n"
"    float4x4 mv;\n"
"    float4x4 mvNorm;\n"
"    float4x4 proj;\n"
"    float4x4 texMtxs[6];\n"
"};\n"
"\n"
"struct VertToFrag\n"
"{\n"
"    float4 pos : SV_Position;\n"
"    float4 mvPos : POSITION;\n"
"    float4 mvNorm : NORMAL;\n"
"    float4 mvBinorm : BINORMAL;\n"
"    float4 mvTangent : TANGENT;\n"
"    float4 color : COLOR;\n"
"    float2 uvs[7] : UV;\n"
"};\n"
"\n"
"VertToFrag main(in VertData v)\n"
"{\n"
"    VertToFrag vtf;\n"
"    float4 pos = float4(v.posIn.xyz, 1.0);\n"
"    float4 normalIn = v.normalIn;\n"
"    vtf.mvPos = mul(mv, pos);\n"
"    vtf.pos = mul(proj, vtf.mvPos);\n"
"    vtf.mvNorm = mul(mvNorm, v.normalIn);\n"
"    vtf.mvBinorm = mul(mvNorm, v.binormalIn);\n"
"    vtf.mvTangent = mul(mvNorm, v.tangentIn);\n"
"    vtf.color = float4(v.colorIn.xyz, 1.0);\n"
"    vtf.uvs[0] = mul(texMtxs[0], pos).xy;\n"
"    vtf.uvs[1] = mul(texMtxs[1], pos).xy;\n"
"    vtf.uvs[2] = mul(texMtxs[2], pos).xy;\n"
"%s" // Additional TCGs here
"    return vtf;\n"
"}\n";

static const char* TessVS =
"struct VertData\n"
"{\n"
"    float4 posIn : POSITION;\n"
"    float4 outerLevelsIn : UV0;\n"
"    float2 innerLevelsIn : UV1;\n"
"};\n"
"\n"
"struct VertToControl\n"
"{\n"
"    float4 minMaxPos : POSITION;\n"
"    float4 outerLevels : OUTERLEVELS;\n"
"    float2 innerLevels : INNERLEVELS;\n"
"};\n"
"\n"
"VertToControl main(in VertData v)\n"
"{\n"
"    VertToControl vtc;\n"
"    vtc.minMaxPos = v.posIn;\n"
"    vtc.outerLevels = v.outerLevelsIn;\n"
"    vtc.innerLevels = v.innerLevelsIn;\n"
"    return vtc;\n"
"}\n";

static const char* TessCS =
"struct VertToControl\n"
"{\n"
"    float4 minMaxPos : POSITION;\n"
"    float4 outerLevels : OUTERLEVELS;\n"
"    float2 innerLevels : INNERLEVELS;\n"
"};\n"
"\n"
"struct ControlToEvaluation\n"
"{\n"
"    float4 minMaxPos : POSITION;\n"
"    float outerLevels[4] : SV_TessFactor;\n"
"    float innerLevels[2] : SV_InsideTessFactor;\n"
"};\n"
"\n"
"struct ControlPoint\n"
"{};\n"
"\n"
"ControlToEvaluation patchmain(InputPatch<VertToControl, 1> vtc, uint id : SV_PrimitiveID)\n"
"{\n"
"    ControlToEvaluation cte;\n"
"    cte.minMaxPos = vtc[id].minMaxPos;\n"
"    for (int i=0 ; i<4 ; ++i)\n"
"        cte.outerLevels[i] = vtc[id].outerLevels[i];\n"
"    for (int i=0 ; i<2 ; ++i)\n"
"        cte.innerLevels[i] = vtc[id].innerLevels[i];\n"
"    return cte;\n"
"}\n"
"\n"
"[domain(\"quad\")]\n"
"[partitioning(\"integer\")]\n"
"[outputtopology(\"triangle_cw\")]\n"
"[outputcontrolpoints(1)]\n"
"[patchconstantfunc(\"patchmain\")]\n"
"ControlPoint main(InputPatch<VertToControl, 1> vtc, uint i : SV_OutputControlPointID, uint id : SV_PrimitiveID)\n"
"{\n"
"    ControlPoint pt;\n"
"    return pt;\n"
"}\n";

static const char* TessES =
"struct Ripple\n"
"{\n"
"    float4 center; // time, distFalloff\n"
"    float4 params; // amplitude, lookupPhase, lookupTime\n"
"};\n"
"\n"
"cbuffer FluidPlaneUniform : register(b0)\n"
"{\n"
"    float4x4 mv;\n"
"    float4x4 mvNorm;\n"
"    float4x4 proj;\n"
"    float4x4 texMtxs[6];\n"
"    Ripple ripples[20];\n"
"    float4 colorMul;\n"
"    float rippleNormResolution;\n"
"};\n"
"\n"
"struct VertToFrag\n"
"{\n"
"    float4 pos : SV_Position;\n"
"    float4 mvPos : POSITION;\n"
"    float4 mvNorm : NORMAL;\n"
"    float4 mvBinorm : BINORMAL;\n"
"    float4 mvTangent : TANGENT;\n"
"    float4 color : COLOR;\n"
"    float2 uvs[7] : UV;\n"
"};\n"
"\n"
"struct ControlToEvaluation\n"
"{\n"
"    float4 minMaxPos : POSITION;\n"
"    float outerLevels[4] : SV_TessFactor;\n"
"    float innerLevels[2] : SV_InsideTessFactor;\n"
"};\n"
"\n"
"struct ControlPoint\n"
"{};\n"
"\n"
"Texture2D RippleMap : register(t%d);\n"
"SamplerState samp : register(s2);\n"
"\n"
"static const float PI_X2 = 6.283185307179586;\n"
"\n"
"static void ApplyRipple(in Ripple ripple, in float2 pos, inout float height)\n"
"{\n"
"    float dist = length(ripple.center.xy - pos);\n"
"    float rippleV = RippleMap.SampleLevel(samp, float2(dist * ripple.center.w, ripple.center.z), 0.0).r;\n"
"    height += rippleV * ripple.params.x * sin((dist * ripple.params.y + ripple.params.z) * PI_X2);\n"
"}\n"
"\n"
"[domain(\"quad\")]\n"
"VertToFrag main(in ControlToEvaluation cte, in float2 TessCoord : SV_DomainLocation,\n"
"                const OutputPatch<ControlPoint, 1> bezpatch)\n"
"{\n"
"    float2 posIn = float2(lerp(cte.minMaxPos.x, cte.minMaxPos.z, TessCoord.x),\n"
"                          lerp(cte.minMaxPos.y, cte.minMaxPos.w, TessCoord.y));\n"
"    float height = 0.0;\n"
"    float upHeight = 0.0;\n"
"    float downHeight = 0.0;\n"
"    float rightHeight = 0.0;\n"
"    float leftHeight = 0.0;\n"
"    for (int i=0 ; i<20 ; ++i)\n"
"    {\n"
"        ApplyRipple(ripples[i], posIn, height);\n"
"        ApplyRipple(ripples[i], posIn + float2(0.0, rippleNormResolution), upHeight);\n"
"        ApplyRipple(ripples[i], posIn - float2(0.0, rippleNormResolution), downHeight);\n"
"        ApplyRipple(ripples[i], posIn + float2(rippleNormResolution, 0.0), rightHeight);\n"
"        ApplyRipple(ripples[i], posIn - float2(rippleNormResolution, 0.0), leftHeight);\n"
"    }\n"
"    float4 normalIn = float4(normalize(float3((leftHeight - rightHeight),\n"
"                                              (downHeight - upHeight),\n"
"                                              rippleNormResolution)), 1.0);\n"
"    float4 binormalIn = float4(normalIn.x, normalIn.z, -normalIn.y, 1.0);\n"
"    float4 tangentIn = float4(normalIn.z, normalIn.y, -normalIn.x, 1.0);\n"
"    float4 pos = float4(posIn, height, 1.0);\n"
"    VertToFrag vtf;\n"
"    vtf.mvPos = mul(mv, pos);\n"
"    vtf.pos = mul(proj, vtf.mvPos);\n"
"    vtf.mvNorm = mul(mvNorm, normalIn);\n"
"    vtf.mvBinorm = mul(mvNorm, binormalIn);\n"
"    vtf.mvTangent = mul(mvNorm, tangentIn);\n"
"    vtf.color = max(height, 0.0) * colorMul;\n"
"    vtf.color.a = 1.0;\n"
"    vtf.uvs[0] = mul(texMtxs[0], pos).xy;\n"
"    vtf.uvs[1] = mul(texMtxs[1], pos).xy;\n"
"    vtf.uvs[2] = mul(texMtxs[2], pos).xy;\n"
"%s\n" // Additional TCGs here
"    return vtf;\n"
"}\n";

static const char* FS =
"struct Light\n"
"{\n"
"    float4 pos;\n"
"    float4 dir;\n"
"    float4 color;\n"
"    float4 linAtt;\n"
"    float4 angAtt;\n"
"};\n"
"struct Fog\n" // Reappropriated for indirect texture scaling
"{\n"
"    int mode;\n"
"    float4 color;\n"
"    float rangeScale;\n"
"    float start;\n"
"    float indScale;\n"
"};\n"
"\n"
"cbuffer LightingUniform : register(b2)\n"
"{\n"
"    Light lights[" _XSTR(URDE_MAX_LIGHTS) "];\n"
"    float4 ambient;\n"
"    float4 kColor0;\n"
"    float4 kColor1;\n"
"    float4 kColor2;\n"
"    float4 kColor3;\n"
"    Fog fog;\n"
"};\n"
"\n"
"static float4 LightingFunc(float3 mvPosIn, float3 mvNormIn)\n"
"{\n"
"    float4 ret = ambient;\n"
"    \n"
"    for (int i=0 ; i<" _XSTR(URDE_MAX_LIGHTS) " ; ++i)\n"
"    {\n"
"        float3 delta = mvPosIn - lights[i].pos.xyz;\n"
"        float dist = length(delta);\n"
"        float angDot = clamp(dot(normalize(delta), lights[i].dir.xyz), 0.0, 1.0);\n"
"        float att = 1.0 / (lights[i].linAtt[2] * dist * dist +\n"
"                           lights[i].linAtt[1] * dist +\n"
"                           lights[i].linAtt[0]);\n"
"        float angAtt = lights[i].angAtt[2] * angDot * angDot +\n"
"                       lights[i].angAtt[1] * angDot +\n"
"                       lights[i].angAtt[0];\n"
"        ret += lights[i].color * clamp(angAtt, 0.0, 1.0) * att * clamp(dot(normalize(-delta), mvNormIn), 0.0, 1.0);\n"
"    }\n"
"    \n"
"    return ret;\n"
"}\n"
"\n"
"struct VertToFrag\n"
"{\n"
"    float4 pos : SV_Position;\n"
"    float4 mvPos : POSITION;\n"
"    float4 mvNorm : NORMAL;\n"
"    float4 mvBinorm : BINORMAL;\n"
"    float4 mvTangent : TANGENT;\n"
"    float4 color : COLOR;\n"
"    float2 uvs[7] : UV;\n"
"};\n"
"\n"
"static float4 MainPostFunc(in VertToFrag vtf, float4 colorIn)\n"
"{\n"
"    float fogZ, temp;\n"
"    switch (fog.mode)\n"
"    {\n"
"    case 2:\n"
"        fogZ = (-vtf.mvPos.z - fog.start) * fog.rangeScale;\n"
"        break;\n"
"    case 4:\n"
"        fogZ = 1.0 - exp2(-8.0 * (-vtf.mvPos.z - fog.start) * fog.rangeScale);\n"
"        break;\n"
"    case 5:\n"
"        temp = (-vtf.mvPos.z - fog.start) * fog.rangeScale;\n"
"        fogZ = 1.0 - exp2(-8.0 * temp * temp);\n"
"        break;\n"
"    case 6:\n"
"        fogZ = exp2(-8.0 * (fog.start + vtf.mvPos.z) * fog.rangeScale);\n"
"        break;\n"
"    case 7:\n"
"        temp = (fog.start + vtf.mvPos.z) * fog.rangeScale;\n"
"        fogZ = exp2(-8.0 * temp * temp);\n"
"        break;\n"
"    default:\n"
"        fogZ = 0.0;\n"
"        break;\n"
"    }\n"
"#if %d\n"
"    return float4(lerp(colorIn, float4(0.0, 0.0, 0.0, 0.0), saturate(fogZ)).rgb, colorIn.a);\n"
"#else\n"
"    return float4(lerp(colorIn, fog.color, saturate(fogZ)).rgb, colorIn.a);\n"
"#endif\n"
"}\n"
"\n"
"SamplerState samp : register(s0);\n"
"%s" // Textures here
"float4 main(in VertToFrag vtf) : SV_Target0\n"
"{\n"
"    float4 lighting = LightingFunc(vtf.mvPos.xyz, normalize(vtf.mvNorm.xyz));\n"
"    float4 colorOut;\n"
"%s" // Combiner expression here
"    return MainPostFunc(vtf, colorOut);\n"
"}\n";

static const char* FSDoor =
"struct Light\n"
"{\n"
"    float4 pos;\n"
"    float4 dir;\n"
"    float4 color;\n"
"    float4 linAtt;\n"
"    float4 angAtt;\n"
"};\n"
"struct Fog\n" // Reappropriated for indirect texture scaling
"{\n"
"    int mode;\n"
"    float4 color;\n"
"    float rangeScale;\n"
"    float start;\n"
"    float indScale;\n"
"};\n"
"\n"
"cbuffer LightingUniform : register(b2)\n"
"{\n"
"    Light lights[" _XSTR(URDE_MAX_LIGHTS) "];\n"
"    float4 ambient;\n"
"    float4 kColor0;\n"
"    float4 kColor1;\n"
"    float4 kColor2;\n"
"    float4 kColor3;\n"
"    Fog fog;\n"
"};\n"
"struct VertToFrag\n"
"{\n"
"    float4 pos : SV_Position;\n"
"    float4 mvPos : POSITION;\n"
"    float4 mvNorm : NORMAL;\n"
"    float4 mvBinorm : BINORMAL;\n"
"    float4 mvTangent : TANGENT;\n"
"    float4 color : COLOR;\n"
"    float2 uvs[7] : UV;\n"
"};\n"
"\n"
"SamplerState samp : register(s0);\n"
"%s" // Textures here
"float4 main(in VertToFrag vtf) : SV_Target0\n"
"{\n"
"    float4 colorOut;\n"
"%s" // Combiner expression here
"    return colorOut;\n"
"}\n";

static std::string _BuildFS(const SFluidPlaneShaderInfo& info)
{
    std::string additionalTCGs;
    std::string textures;
    std::string combiner;
    int nextTex = 0;
    int nextTCG = 3;
    int nextMtx = 4;
    int bumpMapUv, envBumpMapUv, envMapUv, lightmapUv;

    if (info.m_hasPatternTex1)
        textures += hecl::Format("Texture2D patternTex1 : register(t%d);\n", nextTex++);
    if (info.m_hasPatternTex2)
        textures += hecl::Format("Texture2D patternTex2 : register(t%d);\n", nextTex++);
    if (info.m_hasColorTex)
        textures += hecl::Format("Texture2D colorTex : register(t%d);\n", nextTex++);
    if (info.m_hasBumpMap)
        textures += hecl::Format("Texture2D bumpMap : register(t%d);\n", nextTex++);
    if (info.m_hasEnvMap)
        textures += hecl::Format("Texture2D envMap : register(t%d);\n", nextTex++);
    if (info.m_hasEnvBumpMap)
        textures += hecl::Format("Texture2D envBumpMap : register(t%d);\n", nextTex++);
    if (info.m_hasLightmap)
        textures += hecl::Format("Texture2D lightMap : register(t%d);\n", nextTex++);

    if (info.m_hasBumpMap)
    {
        bumpMapUv = nextTCG;
        additionalTCGs += hecl::Format("    vtf.uvs[%d] = mul(texMtxs[0], pos).xy;\n", nextTCG++);
    }
    if (info.m_hasEnvBumpMap)
    {
        envBumpMapUv = nextTCG;
        additionalTCGs += hecl::Format("    vtf.uvs[%d] = mul(texMtxs[3], float4(normalIn.xyz, 1.0)).xy;\n", nextTCG++);
    }
    if (info.m_hasEnvMap)
    {
        envMapUv = nextTCG;
        additionalTCGs += hecl::Format("    vtf.uvs[%d] = mul(texMtxs[%d], pos).xy;\n", nextTCG++, nextMtx++);
    }
    if (info.m_hasLightmap)
    {
        lightmapUv = nextTCG;
        additionalTCGs += hecl::Format("    vtf.uvs[%d] = mul(texMtxs[%d], pos).xy;\n", nextTCG++, nextMtx++);
    }

    switch (info.m_type)
    {
    case EFluidType::NormalWater:
    case EFluidType::PhazonFluid:
    case EFluidType::Four:
        if (info.m_hasLightmap)
        {
            combiner += hecl::Format("    float4 lightMapTexel = lightMap.Sample(samp, vtf.uvs[%d]);\n", lightmapUv);
            // 0: Tex4TCG, Tex4, doubleLightmapBlend ? NULL : GX_COLOR1A1
            // ZERO, TEX, KONST, doubleLightmapBlend ? ZERO : RAS
            // Output reg 2
            // KColor 2
            if (info.m_doubleLightmapBlend)
            {
                // 1: Tex4TCG2, Tex4, GX_COLOR1A1
                // C2, TEX, KONST, RAS
                // Output reg 2
                // KColor 3
                // Tex * K2 + Lighting
                combiner += "    lighting += lerp(lightMapTexel * kColor2, lightMapTexel, kColor3);\n";
            }
            else
            {
                // mix(Tex * K2, Tex, K3) + Lighting
                combiner += "    lighting += lightMapTexel * kColor2;\n";
            }
        }

        // Next: Tex0TCG, Tex0, GX_COLOR1A1
        // ZERO, TEX, KONST, RAS
        // Output reg prev
        // KColor 0

        // Next: Tex1TCG, Tex1, GX_COLOR0A0
        // ZERO, TEX, PREV, RAS
        // Output reg prev

        // Next: Tex2TCG, Tex2, GX_COLOR1A1
        // ZERO, TEX, hasTex4 ? C2 : RAS, PREV
        // Output reg prev

        // (Tex0 * kColor0 + Lighting) * Tex1 + VertColor + Tex2 * Lighting
        if (info.m_hasPatternTex2)
        {
            if (info.m_hasPatternTex1)
                combiner += "    colorOut = (patternTex1.Sample(samp, vtf.uvs[0]) * kColor0 + lighting) *\n"
                            "               patternTex2.Sample(samp, vtf.uvs[1]) + vtf.color;\n";
            else
                combiner += "    colorOut = lighting * patternTex2.Sample(samp, vtf.uvs[1]) + vtf.color;\n";
        }
        else
        {
            combiner += "    colorOut = vtf.color;\n";
        }


        if (info.m_hasColorTex && !info.m_hasEnvMap && info.m_hasEnvBumpMap)
        {
            // Make previous stage indirect, mtx0
            combiner += hecl::Format("    float2 indUvs = (envBumpMap.Sample(samp, vtf.uvs[%d]).ra - float2(0.5, 0.5)) *\n"
                                     "        float2(fog.indScale, -fog.indScale);\n", envBumpMapUv);
            combiner += "    colorOut += colorTex.Sample(samp, indUvs + vtf.uvs[2]) * lighting;\n";
        }
        else if (info.m_hasEnvMap)
        {
            // Next: envTCG, envTex, NULL
            // PREV, TEX, KONST, ZERO
            // Output reg prev
            // KColor 1

            // Make previous stage indirect, mtx0
            if (info.m_hasColorTex)
                combiner += "    colorOut += colorTex.Sample(samp, vtf.uvs[2]) * lighting;\n";
            combiner += hecl::Format("    float2 indUvs = (envBumpMap.Sample(samp, vtf.uvs[%d]).ra - float2(0.5, 0.5)) *\n"
                                     "        float2(fog.indScale, -fog.indScale);\n", envBumpMapUv);
            combiner += hecl::Format("    colorOut = lerp(colorOut, envMap.Sample(samp, indUvs + vtf.uvs[%d]), kColor1);\n",
                                     envMapUv);
        }
        else if (info.m_hasColorTex)
        {
            combiner += "    colorOut += colorTex.Sample(samp, vtf.uvs[2]) * lighting;\n";
        }

        break;

    case EFluidType::PoisonWater:
        if (info.m_hasLightmap)
        {
            combiner += hecl::Format("    float4 lightMapTexel = lightMap.Sample(samp, vtf.uvs[%d]);\n", lightmapUv);
            // 0: Tex4TCG, Tex4, doubleLightmapBlend ? NULL : GX_COLOR1A1
            // ZERO, TEX, KONST, doubleLightmapBlend ? ZERO : RAS
            // Output reg 2
            // KColor 2
            if (info.m_doubleLightmapBlend)
            {
                // 1: Tex4TCG2, Tex4, GX_COLOR1A1
                // C2, TEX, KONST, RAS
                // Output reg 2
                // KColor 3
                // Tex * K2 + Lighting
                combiner += "    lighting += lerp(lightMapTexel * kColor2, lightMapTexel, kColor3);\n";
            }
            else
            {
                // mix(Tex * K2, Tex, K3) + Lighting
                combiner += "    lighting += lightMapTexel * kColor2;\n";
            }
        }

        // Next: Tex0TCG, Tex0, GX_COLOR1A1
        // ZERO, TEX, KONST, RAS
        // Output reg prev
        // KColor 0

        // Next: Tex1TCG, Tex1, GX_COLOR0A0
        // ZERO, TEX, PREV, RAS
        // Output reg prev

        // Next: Tex2TCG, Tex2, GX_COLOR1A1
        // ZERO, TEX, hasTex4 ? C2 : RAS, PREV
        // Output reg prev

        // (Tex0 * kColor0 + Lighting) * Tex1 + VertColor + Tex2 * Lighting
        if (info.m_hasPatternTex2)
        {
            if (info.m_hasPatternTex1)
                combiner += "    colorOut = (patternTex1.Sample(samp, vtf.uvs[0]) * kColor0 + lighting) *\n"
                            "               patternTex2.Sample(samp, vtf.uvs[1]) + vtf.color;\n";
            else
                combiner += "    colorOut = lighting * patternTex2.Sample(samp, vtf.uvs[1]) + vtf.color;\n";
        }
        else
        {
            combiner += "    colorOut = vtf.color;\n";
        }

        if (info.m_hasColorTex)
        {
            if (info.m_hasEnvBumpMap)
            {
                // Make previous stage indirect, mtx0
                combiner += hecl::Format("    float2 indUvs = (envBumpMap.Sample(samp, vtf.uvs[%d]).ra - float2(0.5, 0.5)) *\n"
                                         "        float2(fog.indScale, -fog.indScale);\n", envBumpMapUv);
                combiner += "    colorOut += colorTex.Sample(samp, indUvs + vtf.uvs[2]) * lighting;\n";
            }
            else
            {
                combiner += "    colorOut += colorTex.Sample(samp, vtf.uvs[2]) * lighting;\n";
            }
        }

        break;

    case EFluidType::Lava:
        // 0: Tex0TCG, Tex0, GX_COLOR0A0
        // ZERO, TEX, KONST, RAS
        // Output reg prev
        // KColor 0

        // 1: Tex1TCG, Tex1, GX_COLOR0A0
        // ZERO, TEX, PREV, RAS
        // Output reg prev

        // 2: Tex2TCG, Tex2, NULL
        // ZERO, TEX, ONE, PREV
        // Output reg prev

        // (Tex0 * kColor0 + VertColor) * Tex1 + VertColor + Tex2
        if (info.m_hasPatternTex2)
        {
            if (info.m_hasPatternTex1)
                combiner += "    colorOut = (patternTex1.Sample(samp, vtf.uvs[0]) * kColor0 + vtf.color) *\n"
                            "               patternTex2.Sample(samp, vtf.uvs[1]) + vtf.color;\n";
            else
                combiner += "    colorOut = vtf.color * patternTex2.Sample(samp, vtf.uvs[1]) + vtf.color;\n";
        }
        else
        {
            combiner += "    colorOut = vtf.color;\n";
        }

        if (info.m_hasColorTex)
            combiner += "    colorOut += colorTex.Sample(samp, vtf.uvs[2]);\n";

        if (info.m_hasBumpMap)
        {
            // 3: bumpMapTCG, bumpMap, NULL
            // ZERO, TEX, ONE, HALF
            // Output reg 0, no clamp, no bias

            // 4: bumpMapTCG2, bumpMap, NULL
            // ZERO, TEX, ONE, C0
            // Output reg 0, subtract, clamp, no bias

            combiner += "    float3 lightVec = lights[3].pos.xyz - vtf.mvPos.xyz;\n"
                        "    float lx = dot(vtf.mvTangent.xyz, lightVec);\n"
                        "    float ly = dot(vtf.mvBinorm.xyz, lightVec);\n";
            combiner += hecl::Format("    float4 emboss1 = bumpMap.Sample(samp, vtf.uvs[%d]) + float4(0.5);\n"
                                     "    float4 emboss2 = bumpMap.Sample(samp, vtf.uvs[%d] + float2(lx, ly));\n",
                                     bumpMapUv, bumpMapUv);

            // 5: NULL, NULL, NULL
            // ZERO, PREV, C0, ZERO
            // Output reg prev, scale 2, clamp

            // colorOut * clamp(emboss1 + 0.5 - emboss2, 0.0, 1.0) * 2.0
            combiner += "colorOut *= clamp((emboss1 + float4(0.5) - emboss2) * float4(2.0), float4(0.0), float4(1.0));\n";
        }

        break;

    case EFluidType::ThickLava:
        // 0: Tex0TCG, Tex0, GX_COLOR0A0
        // ZERO, TEX, KONST, RAS
        // Output reg prev
        // KColor 0

        // 1: Tex1TCG, Tex1, GX_COLOR0A0
        // ZERO, TEX, PREV, RAS
        // Output reg prev

        // 2: Tex2TCG, Tex2, NULL
        // ZERO, TEX, ONE, PREV
        // Output reg prev

        // (Tex0 * kColor0 + VertColor) * Tex1 + VertColor + Tex2
        if (info.m_hasPatternTex2)
        {
            if (info.m_hasPatternTex1)
                combiner += "    colorOut = (patternTex1.Sample(samp, vtf.uvs[0]) * kColor0 + vtf.color) *\n"
                            "               patternTex2.Sample(samp, vtf.uvs[1]) + vtf.color;\n";
            else
                combiner += "    colorOut = vtf.color * patternTex2.Sample(samp, vtf.uvs[1]) + vtf.color;\n";
        }
        else
        {
            combiner += "    colorOut = vtf.color;\n";
        }

        if (info.m_hasColorTex)
            combiner += "    colorOut += colorTex.Sample(samp, vtf.uvs[2]);\n";

        if (info.m_hasBumpMap)
        {
            // 3: bumpMapTCG, bumpMap, NULL
            // ZERO, TEX, PREV, ZERO
            // Output reg prev, scale 2
            combiner += hecl::Format("    float4 emboss1 = bumpMap.Sample(samp, vtf.uvs[%d]) + float4(0.5);\n", bumpMapUv);
            combiner += "colorOut *= emboss1 * float4(2.0);\n";
        }

        break;
    }

    combiner += "    colorOut.a = kColor0.a;\n";

    char *finalFS;
    asprintf(&finalFS, FS, int(info.m_additive), textures.c_str(), combiner.c_str());
    std::string ret(finalFS);
    free(finalFS);
    return ret;
}

static std::string _BuildAdditionalTCGs(const SFluidPlaneShaderInfo& info)
{
    std::string additionalTCGs;
    int nextTCG = 3;
    int nextMtx = 4;

    if (info.m_hasBumpMap)
    {
        additionalTCGs += hecl::Format("    vtf.uvs[%d] = mul(texMtxs[0], pos).xy;\n", nextTCG++);
    }
    if (info.m_hasEnvBumpMap)
    {
        additionalTCGs += hecl::Format("    vtf.uvs[%d] = mul(texMtxs[3], float4(normalIn.xyz, 1.0)).xy;\n", nextTCG++);
    }
    if (info.m_hasEnvMap)
    {
        additionalTCGs += hecl::Format("    vtf.uvs[%d] = mul(texMtxs[%d], pos).xy;\n", nextTCG++, nextMtx++);
    }
    if (info.m_hasLightmap)
    {
        additionalTCGs += hecl::Format("    vtf.uvs[%d] = mul(texMtxs[%d], pos).xy;\n", nextTCG, nextMtx);
    }

    return additionalTCGs;
}

static std::string _BuildVS(const SFluidPlaneShaderInfo& info, bool tessellation)
{
    if (tessellation)
        return TessVS;

    std::string additionalTCGs = _BuildAdditionalTCGs(info);

    char *finalVSs;
    asprintf(&finalVSs, VS, additionalTCGs.c_str());
    std::string ret(finalVSs);
    free(finalVSs);
    return ret;
}
template <>
std::string StageObject_CFluidPlaneShader<hecl::PlatformType::D3D11, hecl::PipelineStage::Vertex>::BuildShader
    (const SFluidPlaneShaderInfo& in, bool tessellation)
{
    return _BuildVS(in, tessellation);
}

template <>
std::string StageObject_CFluidPlaneShader<hecl::PlatformType::D3D11, hecl::PipelineStage::Fragment>::BuildShader
    (const SFluidPlaneShaderInfo& in, bool tessellation)
{
    return _BuildFS(in);
}

template <>
std::string StageObject_CFluidPlaneShader<hecl::PlatformType::D3D11, hecl::PipelineStage::Control>::BuildShader
    (const SFluidPlaneShaderInfo& in, bool tessellation)
{
    return TessCS;
}

static std::string BuildES(const SFluidPlaneShaderInfo& info)
{
    int nextTex = 0;
    if (info.m_hasPatternTex1)
        nextTex++;
    if (info.m_hasPatternTex2)
        nextTex++;
    if (info.m_hasColorTex)
        nextTex++;
    if (info.m_hasBumpMap)
        nextTex++;
    if (info.m_hasEnvMap)
        nextTex++;
    if (info.m_hasEnvBumpMap)
        nextTex++;
    if (info.m_hasLightmap)
        nextTex++;

    std::string additionalTCGs = _BuildAdditionalTCGs(info);

    char *finalESs;
    asprintf(&finalESs, TessES, nextTex, additionalTCGs.c_str());
    std::string ret(finalESs);
    free(finalESs);

    return ret;
}
template <>
std::string StageObject_CFluidPlaneShader<hecl::PlatformType::D3D11, hecl::PipelineStage::Evaluation>::BuildShader
    (const SFluidPlaneShaderInfo& in, bool tessellation)
{
    return BuildES(in);
}

static std::string _BuildVS(const SFluidPlaneDoorShaderInfo& info)
{
    char *finalVSs;
    asprintf(&finalVSs, VS, "");
    std::string ret(finalVSs);
    free(finalVSs);
    return ret;
}

static std::string _BuildFS(const SFluidPlaneDoorShaderInfo& info)
{
    int nextTex = 0;
    std::string textures;
    std::string combiner;

    if (info.m_hasPatternTex1)
    {
        textures += hecl::Format("Texture2D patternTex1 : register(t%d);\n", nextTex++);
    }
    if (info.m_hasPatternTex2)
    {
        textures += hecl::Format("Texture2D patternTex2 : register(t%d);\n", nextTex++);
    }
    if (info.m_hasColorTex)
    {
        textures += hecl::Format("Texture2D colorTex : register(t%d);\n", nextTex++);
    }

    // Tex0 * kColor0 * Tex1 + Tex2
    if (info.m_hasPatternTex1 && info.m_hasPatternTex2)
    {
        combiner += "    colorOut = patternTex1.Sample(samp, vtf.uvs[0]) * kColor0 *\n"
                    "               patternTex2.Sample(samp, vtf.uvs[1]);\n";
    }
    else
    {
        combiner += "    colorOut = float4(0.0);\n";
    }

    if (info.m_hasColorTex)
    {
        combiner += "    colorOut += colorTex.Sample(samp, vtf.uvs[2]);\n";
    }

    combiner += "    colorOut.a = kColor0.a;\n";

    char *finalFSs;
    asprintf(&finalFSs, FSDoor, textures.c_str(), combiner.c_str());
    std::string ret(finalFSs);
    free(finalFSs);
    return ret;
}

template <>
std::string StageObject_CFluidPlaneDoorShader<hecl::PlatformType::D3D11, hecl::PipelineStage::Vertex>::BuildShader
    (const SFluidPlaneDoorShaderInfo& in)
{
    return _BuildVS(in);
}

template <>
std::string StageObject_CFluidPlaneDoorShader<hecl::PlatformType::D3D11, hecl::PipelineStage::Fragment>::BuildShader
    (const SFluidPlaneDoorShaderInfo& in)
{
    return _BuildFS(in);
}